Display panel or portion thereof with a graphical user interface



FIG. 1 is a front view of a display panel or portion thereof with agraphical user interface showing a first embodiment of our design;

FIG. 2 is a front view of a display panel or portion thereof with agraphical user interface showing a second embodiment thereof;

FIG. 3 is a front view of a display panel or portion thereof with agraphical user interface showing a third embodiment thereof;

FIG. 4 is a front view of a display panel or portion thereof with agraphical user interface showing a fourth embodiment thereof;

FIG. 5 is a front view of a display panel or portion thereof with agraphical user interface showing a fifth embodiment thereof; and,

FIG. 6 is a front view of a display panel or portion thereof with agraphical user interface showing a sixth embodiment thereof.

The broken lines depicting a display panel or portion thereof areincluded for the purpose of illustrating environmental structure andform no part of the design. The broken lines depicting portions of agraphical user interface are included for illustrating environmentalaspects of a display panel or portion thereof with a graphical userinterface and form no part of the design.

CLAIM The ornamental design for display panel or portion thereof with agraphical user interface, as shown and described.